MicroTherm™ Down Shirtclearance

The lightest down layer in our long history, the MicroTherm™ Down Shirt is the ideal weight for packing or using as a mid, last or emergency layer. The 800 fill Premium European Goose Down insulation traps core heat, while a lightweight nylon ripstop shell treated with StormRepel® DWR finish sheds light precipitation and snow.

Unbelievable

"This is a piece of clothing that you have to experience to believe. It weighs nothing but is very warm and fits perfectly. On an hour walk, three different people stopped to ask me about this cool jacket and I think they are all headed to buy one."
San Pedro, CA

• WATER-REPELLENT, WINDPROOF SHELLLightweight 1.2 oz 20-denier ripstop nylon with StormRepel® DWR finish
• 800 FILL PREMIUM EUROPEAN GOOSE DOWNDown-packed micro-channels keep you warm with minimal weight and bulk
• INTEGRATED STRETCH PANELSIncrease breathability, improve range of motion and allow for a trim, athletic fit
• LIGHTWEIGHT AND PACKABLEStows easily in small spaces

FIT

Active Fit: Garment fits closer to the body; designed to fit over baselayers and light midlayers

• LOW-PROFILE HAND POCKETSLightweight invisible zippers keep items secure
• ELASTICIZED CUFFSSeal in heat
• PACKS INTO ITS OWN POCKETInterior carabiner clip-in loop

• 100% nylon shell; 95% polyester/5% spandex stretch panels; 800 fill down insulation
• Center back length: Reg. 27.5", Tall 29.5"
• Garment weight: 12 oz.
• Imported
• Machine wash

MicroTherm™ Down

MicroTherm™ is First Ascent's lightest, warmest down construction, which pairs high quality 800 fill with some of the narrowest channel baffling in the outdoor industry.

The narrow-channel construction prevents down migration and keeps the fill more evenly distributed throughout the garment—minimizing the cold spots and filling voids that could allow body heat to escape.

This elevates the overall thermal value of MicroTherm™ to an extremely high degree, meaning more warmth for the same weight, reducing overall bulk and allowing for easier layering as well as greater packability.

We like to emphasize it's the warmest, lightest down we've ever made.

StormRepel®

Our durable water-repellent (DWR) finish causes moisture to bead up on the surface so it rolls off or evaporates rather than soaking into the fabric.